Tire building machine edge wrapper

Abstract

The present invention discloses a bead flipper for a tire building machine, which comprises a mechanical bead flipping mechanism arranged on a bead seat. The mechanical bead flipping mechanism includes bead turning rods that are circumferentially and evenly distributed. An annular tape is tightly sleeved on the rod bodies of each bead turning rod. A rolling wheel is arranged at the front end of the rod body of each bead turning rod. The rear end of the rod body is hinged to a push plate, and at least one hook is arranged at the top of the rod body behind the annular tape. Driven by a power mechanism, the push plate drives each bead turning rod to move forward and backward relative to the building drum along the axial direction. A buckle that can be hooked with the hook to radially expand the rod body is arranged on the forward path of each bead turning rod. The buckle is installed on the bead seat through a torsion spring and returns to the hooked position. A top ring for pushing the buckle forward to unhook the hook when the push plate retreats is arranged on the bead seat. The unhooked bead turning rod contracts under the action of the annular tape. Each bead turning rod of the present invention can move freely axially and radially to continuously roll the rubber compound.

Description

Technical Field

[0001] The present invention relates to the structural components of tire manufacturing equipment, and particularly to a bead flipper of a tire building machine. Background Art

[0002] When manufacturing the carcass of a traditional all-steel giant tire, there are two structures for wrapping the rubber compound on the building drum: mechanical type and capsule type.

[0003] The mechanical bead wrapping mechanism of the traditional technology includes several rollers installed at the front end of the bead turning bar. The bead turning bar adopts a structure with a torsion spring for opening and a guide groove for positioning. The size of the guide groove is fixed. The scaling of the rollers at the front end of the bead turning bar can only be achieved by changing the distance between the bead turning bar moving back and forth and the guide groove. The rollers are radially limited but axially free. When the building drum is pressed, it does not move. If the bead turning bar is reduced a little, it needs to move forward as a whole to press onto the building drum, and vice versa.

[0004] Therefore, when the existing mechanical bead wrapping mechanism compacts the rubber compound, the pressing of the rollers on the rubber compound is not continuous, which easily damages the rubber, causing air pockets and wrinkles, and has an adverse impact on the quality of the carcass. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a bead flipper of a tire building machine that can continuously roll press the rubber compound.

[0006] The bead flipper of the tire building machine that can solve the above technical problem includes a mechanical bead wrapping mechanism provided on a bead seat. The bead seat is coaxially installed with the building drum. The difference is that: the mechanical bead wrapping mechanism includes bead turning bars evenly distributed in a circumferential direction. An annular tape is tightly fastened on the rod body of each bead turning bar. A rolling wheel is provided at the front end of the rod body of each bead turning bar. The rear end of the rod body of each bead turning bar is hinged to a push plate, and at least one hook is provided at the top of the rod body behind the annular tape; the push plate drives each bead turning bar to move forward and backward relative to the building drum along the axial direction under the drive of a power mechanism. A buckle that can hook with the hook and radially expand the rod body is provided on the forward path of each bead turning bar. The buckle is installed on the bead seat through a torsion spring and returns to the hooked position. A top ring is provided on the bead seat to push the buckle forward to unhook the hook when the push plate retreats. The unhooked bead turning bar radially contracts under the action of the annular tape.

[0007] One structure of the thrust mechanism includes a thrust plate. The thrust plate is installed on a linear guide rail Ⅰ provided on the bead seat through a sliding seat Ⅰ. The top ring is installed at the front end of the thrust plate. The rear end of the thrust plate is hinged to the cylinder rod of a push cylinder extending forward. The push cylinder is installed on the bead seat through a cylinder seat.

[0008] Further, the push plate is installed on the linear guide rail II provided on the edge wrapping seat through the sliding seat II, and moves forward and backward under the drive of the edge wrapping cylinder, thereby driving the expansion and contraction of each reverse wrapping rod.

[0009] Advantages of the present invention:

[0010] 1. In the edge wrapping device structure of the tire forming machine of the present invention, the annular tape can continuously provide the tension force for the contraction of each reverse wrapping rod, and the hooking structure is adopted to expand each reverse wrapping rod.

[0011] 2. In the structure of the present invention, each reverse wrapping rod can move freely in the axial and radial directions, and can continuously roll-press the rubber compound. Description of the drawings

[0012] Figure 1 Is an axonometric view of an embodiment of the present invention.

[0013] Figure 2 Is Figure 1 The main sectional view of the embodiment.

[0014] Figure 3 Is Figure 2 The partial enlarged view of A in.

[0015] Figure number identification: 1. Edge wrapping seat; 2. Forming drum; 3. Reverse wrapping rod; 3-1. Hook; 4. Push plate; 5. Rolling wheel; 6. Hook buckle; 7. Torsion spring; 8. Hook buckle seat; 9. Top ring; 10. Annular tape; 11. Thrust plate; 12. Linear guide rail I; 13. Sliding seat I; 14. Thrust cylinder; 15. Linear guide rail II; 16. Fula wheel; 17. Thrust mechanism; 18. Main shaft; 19. Edge wrapping cylinder. Specific embodiments

[0016] The technical solutions of the present invention will be further described below in conjunction with the embodiments shown in the drawings.

[0017] The edge wrapping device of the tire building machine of the present invention includes a mechanical edge wrapping mechanism. The mechanical edge wrapping mechanism is arranged on the push plate 4 of the edge wrapping seat 1. The edge wrapping seat 1 is installed on the main shaft 18 at one side end of the building drum 2. The push plate 4 is installed on the linear guide rail II 15 arranged on the edge wrapping seat 1 through the sliding seat II. The linear guide rail II 15 is installed on the edge wrapping seat 1. An edge wrapping cylinder 19 is installed on the edge wrapping seat 1 through a cylinder seat. The cylinder rod of the edge wrapping cylinder 19 extending forward (towards the direction of the building drum 2) is installed on the push plate 4 through a joint. The mechanical edge wrapping mechanism includes reverse wrapping rods 3 circumferentially and evenly arranged between the push plate 4 and the building drum 2. The rear ends of the rod bodies of the reverse wrapping rods 3 are hinged at corresponding positions on the push plate 4. Each hinged part has a limiting structure for positioning the reverse wrapping rod 3 in the horizontal position. Rolling wheels 5 are installed at the front ends of the rod bodies of the reverse wrapping rods 3. An annular tape 10 is tightly fastened on the top of the central part of the rod body of each reverse wrapping rod 3. A plurality of forward hook lugs 3-1 are arranged at equal intervals on the top of the rod body of the reverse wrapping rod 3 behind the annular tape 10. A plurality of Fuller wheels 16 are arranged at the bottom of the rod body of each reverse wrapping rod 3. At least one Fuller wheel 16 is located in front of the annular tape 10, as Figure 1 , Figure 2 , Figure 3 shown.

[0018] A buckle 6 is provided corresponding to the foremost hook lug 3-1. The buckle 6 is installed on the buckle seat 8 through a torsion spring 7. The buckle seat 8 is installed on the edge wrapping seat 1. Under the action of the torsion spring 7, the buckle 6 rotates downward to the vertical return position (the lower end of the buckle 6 is a hook head, and a rearward extending top plate is provided on the upper part of the buckle 6). A thrust mechanism 17 is provided on the rear side of the buckle 6 in the return position. The thrust mechanism 17 includes a top ring 9 and a thrust plate 11. The thrust plate 11 is installed on the linear guide rail I 12 through the sliding seat I 13. The linear guide rail I 12 is installed on the edge wrapping seat 1. The top ring 9 is installed at the front end of the thrust plate 11. The rear end of the thrust plate 11 is hinged on the cylinder rod of the pushing cylinder 14 extending forward. The cylinder body of the pushing cylinder 14 is installed on the edge wrapping seat 1 through a cylinder seat, as Figure 1 , Figure 2 , Figure 3 shown.

[0019] The operation mode of the present invention is as follows:

[0020] 1. During reverse wrapping, the edge wrapping cylinder 19 acts to push the push plate 4 forward. The push plate 4 pushes the reverse wrapping rods 3 in the radially contracted state towards the end face of the building drum 2. When the foremost hook lug 3-1 on each reverse wrapping rod 3 is hooked by the corresponding buckle 6, the reverse wrapping rods 3 moving forward continue to expand radially synchronously to perform the reverse wrapping operation on the rubber material until the rolling wheels 5 at the front ends of the reverse wrapping rods 3 roll onto the drum surface of the building drum 2. At this time, each buckle 6 is driven by the corresponding hook lug 3-1 to rotate to an approximately horizontal position.

[0021] 2. During forward wrapping, the pushing cylinder 14 operates to push the thrust plate 11 forward. The top ring 9 on the thrust plate 11 acts on the top plates of the respective buckles 6, pushing the respective buckles 6 to rotate forward and upward to disengage from the hook 3-1, thereby unlocking each reverse wrapping rod 3. The edge folding cylinder 19 pulls the push plate 4 backward to retract. The unlocked reverse wrapping rods 3 radially contract synchronously under the action of the annular tape 10 and roll on the rubber material for forward wrapping operation until each reverse wrapping rod 3 contracts to the horizontal state.

[0022] The pushing cylinder 14 operates to pull the thrust plate 11 backward to return to its original position. The top ring 9 releases the pressing on the respective buckles 6, and the respective buckles 6 rotate backward and downward to return to the initial vertical state.

[0023] In the present invention, during forward wrapping and reverse wrapping, the Frelon wheels 16 at the bottom of the reverse wrapping rods 3 move forward and backward and rotate circumferentially on the rubber material.

Claims

1. Method for wrapping the edge of a tire building machine, characterized in that A tire building machine edge wrapper is adopted. The tire building machine edge wrapper includes a mechanical edge wrapping mechanism disposed on an edge wrapping seat (1). The edge wrapping seat (1) is coaxially installed with a building drum (2). The mechanical edge wrapping mechanism includes circumferentially evenly distributed reverse wrapping rods (3). An annular tape (10) is tightly fastened on the rod bodies of the reverse wrapping rods (3). At the front end of the rod body of each reverse wrapping rod (3), a rolling wheel (5) is provided. The rear end of the rod body of each reverse wrapping rod (3) is hinged to a push plate (4), and at least one hook (3-1) located behind the annular tape (10) is provided at the top of the rod body. The push plate (4) drives each reverse wrapping rod (3) to move forward and backward relative to the building drum (2) along the axial direction under the drive of a power mechanism. On the forward path of each reverse wrapping rod (3), a buckle (6) capable of hooking with the hook (3-1) to radially expand the rod body is provided. The buckle (6) is installed on the edge wrapping seat (1) through a torsion spring (7) and returns to the hooked position. On the edge wrapping seat (1), a top ring (9) is provided, which pushes the buckle (6) forward to unlock the hook (3-1) when the push plate (4) retreats through a thrust mechanism (17). The unlocked reverse wrapping rod (3) contracts under the action of the annular tape (10). The thrust mechanism (17) includes a thrust plate (11). The thrust plate (11) is installed on a linear guide rail I (12) provided on the edge wrapping seat (1) through a sliding seat I (13). The top ring (9) is installed at the front end of the thrust plate (11). The rear end of the thrust plate (11) is hinged to the cylinder rod that extends forward of a push cylinder (14). The push cylinder (14) is installed on the edge wrapping seat (1) through a cylinder seat. The push plate (4) is installed on a linear guide rail II (15) provided on the edge wrapping seat (1) through a sliding seat II and moves forward and backward under the drive of an edge wrapping cylinder (19). Its operation mode is as follows: ①. During reverse wrapping, the edge wrapping cylinder (19) acts to push the push plate (4) forward. The push plate (4) pushes each reverse wrapping rod (3) in a radially contracted state towards the end face of the building drum (2). When the foremost hook (3-1) on each reverse wrapping rod (3) is hooked by the corresponding buckle (6), each reverse wrapping rod (3) that continues to move forward starts to radially expand synchronously to perform reverse wrapping operation on the rubber material until the rolling wheels (5) at the front ends of the reverse wrapping rods (3) roll onto the drum surface of the building drum (2). At this time, each buckle (6) is driven by the corresponding hook (3-1) to rotate to an approximately horizontal position. ②. During forward wrapping, the push cylinder (14) acts to push the thrust plate (11) forward. The top ring (9) on the thrust plate (11) acts on the top plates of the buckles (6) to push each buckle (6) to rotate forward and upward to disengage from the hook (3-1), that is, to unlock each reverse wrapping rod (3). The edge wrapping cylinder (19) pulls the push plate (4) backward to retreat. Each unlocked reverse wrapping rod (3) radially contracts synchronously under the action of the annular tape (10) and rolls on the rubber material to perform forward wrapping operation until each reverse wrapping rod (3) contracts to a horizontal state. ③. The pushing cylinder (14) operates to pull the pushing plate (11) backward to return to its original position, the top ring (9) releases the pressing on each hook (6), and each hook (6) rotates backward and downward to return to its initial vertical state.

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